Mastering Linux Network Administration by Lacroix, Jay -- Read -- Imperial Library of Trantor

Index

Mastering Linux Network Administration

Table of Contents Mastering Linux Network Administration Credits About the Author About the Reviewers www.PacktPub.com

Support files, eBooks, discount offers, and more

Why subscribe? Free access for Packt account holders

Preface

What this book covers What you need for this book Who this book is for Conventions Reader feedback Customer support

Downloading the example code Downloading the color images of this book Errata Piracy Questions

1. Setting up Your Environment

Getting started Distributions to consider Physical machines versus virtual machines Setting up and configuring VirtualBox

Acquiring VirtualBox Downloading and installing the Extension Pack

Acquiring and installing Debian 8 Acquiring and installing CentOS 7 Summary

2. Revisiting Linux Network Basics

Understanding the TCP/IP protocol suite Naming the network device Understanding Linux hostname resolution Understanding the net-tools and iproute2 suites Manually managing network interfaces Managing connections with Network Manager Summary

3. Communicating Between Nodes via SSH

Using OpenSSH Installing and configuring OpenSSH

Connecting to network hosts via openssh-client

The OpenSSH config file Understanding and utilizing scp

Transferring files to another node via scp Tunneling traffic via SSH

Generating public keys Keeping SSH connections alive Exploring an alternative to SSH – utilizing Mosh (mobile shell) Summary

4. Setting up a File Server

File server considerations NFS v3 versus NFS v4

Setting up an NFS server

Learning the basics of Samba

Setting up a Samba server

Mounting network shares Automatically mounting network shares via fstab and systemd Creating networked filesystems with SSHFS Summary

5. Monitoring System Resources

Inspecting and managing processes Understanding load average Checking available memory Using shell-based resource monitors Scanning used storage Introduction to logging Maintaining log size with logrotate Understanding the systemd init system Understanding the systemd journal Summary

6. Configuring Network Services

Planning your IP address layout Installing and configuring a DHCP server Installing and configuring a DNS server Setting up an internal NTP server Summary

7. Hosting HTTP Content via Apache

Installing Apache Configuring Apache Adding modules Setting up virtual hosts Summary

8. Understanding Advanced Networking Concepts

Dividing your network into subnets Understanding the CIDR notation Implementing Quality of Service Routing TCP/IP traffic Creating redundant DHCP and DNS servers Summary

9. Securing Your Network

Limiting the attack surface Securing OpenSSH Configuring the iptables firewall Protecting system services with fail2ban Understanding SELinux Configuring Apache to utilize SSL Deploying security updates Summary

10. Troubleshooting Network Issues

Tracing routing issues Troubleshooting DHCP issues Troubleshooting DNS issues Displaying connection statistics with netstat Scanning your network with Nmap and Zenmap Installing missing firmware on Debian systems Troubleshooting issues with Network Manager Summary

Index